Herbs in epilepsy: evidence for efficacy, toxicity, and interactions

Area of Science:

• Pharmacology
• Herbal Medicine
• Neurology

Background:

• Herbs and dietary supplements are widely used for epilepsy treatment.
• Evidence for their efficacy and safety is often lacking.
• Ten specific products are discussed due to recommendations or theoretical antiepileptic action.

Purpose of the Study:

• To review the safety and efficacy of commonly used herbs and supplements in epilepsy.
• To identify potential proconvulsant effects and adverse reactions.
• To examine pharmacokinetic and pharmacodynamic interactions with conventional antiepileptic drugs.

Main Methods:

• Literature review of ten specific herbs/supplements (American hellebore, betony, blue cohosh, kava, mistletoe, mugwort, pipsissiwa, skullcap, valerian, melatonin).
• Analysis of reported antiepileptic rationales, proconvulsant effects, adverse events, and drug interactions.
• Examination of interactions with P450 enzymes and P-glycoprotein transport systems.

Main Results:

• Several reviewed products may paradoxically increase seizure activity (proconvulsant).
• Serious adverse effects are associated with some of these alternative agents.
• Significant pharmacokinetic and pharmacodynamic interactions with conventional antiepileptic drugs are possible.

Conclusions:

• Patients using alternative epilepsy treatments should be carefully monitored.
• Concurrent use of herbs/supplements with traditional antiepileptic drugs requires caution.
• Careful inquiry and monitoring are essential to manage risks associated with alternative epilepsy therapies.